The weather in Hilo in August is hot. The average temperatures are between 20°C and 24°C.
You can expect about 3 to 8 days of rain in Hilo during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Hilo in August 2025.
If you’re planning to visit Hilo in the near future, we highly recommend that you review the 14 day weather forecast for Hilo before you arrive.
Temperatures
24° / 20°
Rainy Days
4
Snowy Days
0
Dry Days
27
Rainfall
146
mm
Sun Hours
10.9
Hrs
